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INTERIM REPORT #25 - Analysis of Ground Water Samples STUDY TITLE Analysis of Perfluorobutanesulfonate (PFBS), Perfluorohexanesulfonate (PFHS), and Perfluorooctanesulfonate (PFOS) in Water, Soil, Sediment, Fish, Clams, Vegetation, Small Mammal Liver and Small Mammal Serum Using LC/MS/MS for the 3M Decatur Monitoring Program DATA REQUIREMENTS EPA TSCA Good Laboratory Practice Standards 40 CFR 792 STUDY DIRECTOR Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 INTERIM REPORT COMPLETION DATE November 22,2006 PERFORMING LABORATORY Exygen Research 3058 Research Drive State College, PA 16801 Phone:814-272-1039 STUDY SPONSOR 3M Company 3M Building 0236-01-B-10 St.

#. i - / 3/z Tom Cortina <cortina@alcaIde-fay.com> on 04/30/2003 11:02:02 AM Please respond to Tom Cortina <cortina@alcalde-fay.com> To: oppt.ncic@epamail.epa.gov cc: Mary Dominiak/DC/USEPA/US@EPA Subject: Submission to AR 226 April 30, 2003 SUBJECT: Submission to AR 226 Attached is an overview of the mechanics of film formation of aqueous film-forming foam (AFFF) fire fighting agents.

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PASCAGOULA BASELINE STUDY/REPORT FOR FIRST CHEMICAL CORPORATION PASCAGOULA, MISSISSIPPI Date: October 2006 Project No.: 18984786.06051 508800 Pascagoula Baseline Study/Report Table of Contents TABLE OF CONTENTS Executive Summary .............................................................................................................1 1.0 Introduction.................................................................................................................1 1.1 Background on PFOA and PFOS ......................................................................1 1.2 Report Content ...................................................................................................2 2.0 Pascagoula Region Water and Solids Sampling .........................................................3 2.1 Introduction and Background ............................................................................3 2.2 Water and Solids Field Sampling ......................................................................3 2.2.1 Surface Water and Wastewater Sampling ............................................3 2.2.2 Potable and Industrial Water Sampling................................................5 2.2.3 Groundwater Sampling.........................................................................5 2.2.4 Pascagoula POTW Sludge Sampling ...................................................6 2.3 Laboratory Analysis and Data Review - Water and Solid Samples..................6 2.4 Discussion of Analytical Results .......................................................................8 2.4.1 Surface Water .......................................................................................8 2.4.2 Groundwater.........................................................................................9 2.4.3 Pascagoula POTW Sludge..................................................................10 2.5 General Occurrence of PFOA in the Water and Solids ...................................10 2.5.1 Discussion of PFOA Concentrations in Fresh Water .........................10 2.5.2 Discussion of PFOA Concentrations in Salt Water............................11 2.5.3 Discussion of PFOA in Waste Water Treatment Facilities ................11 2.6 Summary of Water and Solids Field Sampling................................................11 3.0 Pascagoula Region Fish and Invertebrate Sampling.................................................13 3.1 Introduction and Background ..........................................................................13 3.2 Fish and Invertebrate Field Sampling ..............................................................13 3.2.1 Selected Fish Sampling ......................................................................13 3.2.2 Selected Invertebrate Sampling..........................................................14 3.3 Laboratory Analysis and Data Review - Fish and Invertebrate Samples........14 3.4 Discussion of Analytical Results for Fish and Invertebrates ...........................15 3.4.1 Fish .....................................................................................................15 3.4.2 Invertebrates .......................................................................................16 3.5 General Occurrence of PFOA in Fish and Invertebrates .................................16 3.5.1 Discussion of PFOA Concentrations in Saltwater Fish......................16 3.5.2 Discussion of PFOA Concentrations in Marine Invertebrates ...........17 3.5.3 Bioaccumulation Discussion ..............................................................17 3.6 Summary of Invertebrates and Fish Field Sampling........................................18 4.0 References.................................................................................................................19 S:\Groups\URS\WP\Pascagoula\508800 Baseline Study\Report\FCC BaselineStudyRpt.doc October 2006 i Pascagoula Baseline Study/Report Table of Contents Table 1a Table 1b Table 2 Table 3a Table 3b Table 4 Table 5 TABLES PFOA Summary Water Samples PFOS Summary Water Samples PFOA and PFOS Summary of Solids Sample PFOA Summary Biological Samples PFOS Summary Biological Samples Summary of Background Information on PFOA from the Literature Cited in This Report Biological Sample Sizes Figure 1 Figure 2 FIGURES Baseline Study Sampling Locations Groundwater and Storm Water Sample Locations Appendix A Analytical Data APPENDICES S:\Groups\URS\WP\Pascagoula\508800 Baseline Study\Report\FCC BaselineStudyRpt.doc October 2006 ii Pascagoula Baseline Study/Report Acronyms ACRONYMS Acronym APFO BCF BAF COC DuPont FCC LC/MS/MS LOD LOQ MDEQ MDL MDMR MS ND NQ g/Kg g/L ng/g NERR PBS PFOA PFOS POTW Ppb PQL QAPP QC RPD SNUR SOP STL SWPPP WWTP Definition / Description Ammonium perfluorooctanoate Bioconcentration Factor Bioaccumulation Factor Chain of Custody E.